Analysis

  • max time kernel
    130s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    08-11-2020 17:52

General

  • Target

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5.dll

  • Size

    2.0MB

  • MD5

    c82e5ec1f5966dcedacca3f586d56688

  • SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

  • SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

  • SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

Malware Config

Signatures

  • Blacklisted process makes network request 3 IoCs
  • Modifies AppInit DLL entries 2 TTPs
  • Loads dropped DLL 4 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 1 IoCs
  • Modifies data under HKEY_USERS 53 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4076
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5.dll,#1
      2⤵
      • Blacklisted process makes network request
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3800
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\system32\rundll32.exe" "c:\Program Files (x86)\AppendFunc\AppendFunc.dll",serv -install
        3⤵
        • Loads dropped DLL
        PID:2796
  • C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" "c:\Program Files (x86)\AppendFunc\AppendFunc.dll",serv
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "c:\Program Files (x86)\AppendFunc\AppendFunc.dll",serv
      2⤵
      • Loads dropped DLL
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      PID:1464

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \??\c:\Program Files (x86)\AppendFunc\AppendFunc.dll
    MD5

    c82e5ec1f5966dcedacca3f586d56688

    SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

    SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

    SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

  • \Program Files (x86)\AppendFunc\AppendFunc.dll
    MD5

    c82e5ec1f5966dcedacca3f586d56688

    SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

    SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

    SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

  • \Program Files (x86)\AppendFunc\AppendFunc.dll
    MD5

    c82e5ec1f5966dcedacca3f586d56688

    SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

    SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

    SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

  • \Program Files (x86)\AppendFunc\AppendFunc.dll
    MD5

    c82e5ec1f5966dcedacca3f586d56688

    SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

    SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

    SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

  • \Program Files (x86)\AppendFunc\AppendFunc.dll
    MD5

    c82e5ec1f5966dcedacca3f586d56688

    SHA1

    f2bbea2aeb5b348dff177d5351e7c499d6003a9d

    SHA256

    db1773d4d893fc155715bab87a74ee13daf7f2ab8330109f794b4520662cb6b5

    SHA512

    0fd19f49d76e2cbfd40858dcc1c22877a364af132b4da661eee61cf06569b9d2bbd8aaf6c9d3708e545fb23fd68c6e5d41898dae12d9ac7859b7ee52cfdf47e2

  • memory/1464-8-0x0000000000000000-mapping.dmp
  • memory/1464-11-0x000000007EAF0000-0x000000007EE45000-memory.dmp
    Filesize

    3.3MB

  • memory/1464-10-0x00000000005F0000-0x00000000005F1000-memory.dmp
    Filesize

    4KB

  • memory/2796-3-0x0000000000000000-mapping.dmp
  • memory/2796-7-0x000000007E2A0000-0x000000007E5F5000-memory.dmp
    Filesize

    3.3MB

  • memory/2796-6-0x00000000009E0000-0x00000000009E1000-memory.dmp
    Filesize

    4KB

  • memory/3800-0-0x0000000000000000-mapping.dmp
  • memory/3800-2-0x000000007E5F0000-0x000000007E945000-memory.dmp
    Filesize

    3.3MB

  • memory/3800-1-0x0000000000B20000-0x0000000000B21000-memory.dmp
    Filesize

    4KB